(57) A gauge adapter for bullets in a break-action shotgun, including a bullet barrel
(2) fixed in a plug (3) having the dimensions of the shot cartridge. The adapter includes
a pressure means, disposed for pressing the plug (3) solidly against the wall of the
transition cone in the shot bore when the fire-arm is closed. The forward part of
the plug has a rounded breast (10) against the transition cone, the radius of the
breast corresponding to the cylindrical radius of the plug. The breast thus acts in
the transition cone as the ball in a ball joint.
The pressure means can be an elastomeric pressure pad (6) disposed in a practically
cylindrical cavity (5) in the rear face (4) of the plug: The pressure pad is outwardly
covered by a plate (7) extending up to half the bullet barrel (2) and has a cut-out
forthe bullet cartridge. In the area of the cartridge rim the plate (7) has a depression
for engaging under the rim of the cartridge. When the fire-arm is opened, the plate
acts as a shell extractor so that the shell can be gripped and taken out with the
aid of a finger nail.
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